It's also possilbe to make the mission end by landing on a carrier or wherever player is stationed, so I think it will be used in low altitude (airports, it would be great to see sea-borne carriers) and space (space stations) missions.

[colour=burlywood]That'd be cool - frigates lobbing missiles from 50 or 60 kms away, carriers pumping flak into the atmosphere to defend against them while fighters flit around trying to shoot them down, and not themselves get shot down. Like FS2 combat, but quicker, and with a ground.

Only issue'd be there's no horizon in FS modded surface combat, so over the horizon is obviously out of the question.[/colour]

That's 340m/s, a.k.a. Mach 1. 450m/s is with afterburner. And yes, it'll be a typical speed for fighters. With minor differences, besides afterburner performance variety and acceleration/decceleration speed. I know it's a bit slow, compared to what modern fightercraft can reach ( Mach 2 and so on ), but it's the highest speed without making it impossible to play or frustrating.

I got atmosphere to work with various somewhat-hackish solutions. Rather complicated to explain, yet simple, IMO, to produce. I might release a demo of some sort, once the modpack is done, to show how everything works and improve it. And then afterwards work on the campaigns.